Finding the Fourth Proportional to 644,339.77, 889,136.79 and 372,425.26
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Solution
The fourth proportional to 644,339.77, 889,136.79 and 372,425.26 is: 513,916.75
Step by Step Solution
- Step 1: Write the proportion equation
644,339.77 : 889,136.79 = 372,425.26 : x - Step 2: Convert to fraction form
644,339.77/889,136.79 = 372,425.26/x - Step 3: Cross multiply
644,339.77x = 889,136.79 × 372,425.26 - Step 4: Simplify right side
644,339.77x = 331,137,000,191.32 - Step 5: Solve for x
x = 331,137,000,191.32/644,339.77 - Step 6: Final answer
x = 513,916.75
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.